Method of making spools



Oct 18,1927. A c HOPKINS 1 METHOD OF MAKING SPOOLS Filed April 18. 1924q III 7 6 6c fix Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

ARTHUR C. HOPKINS, OF N ILES, MICHIGAN, ASSIGNOR T0 NATIONAL STANDARDCOM- PANY, 0F NILES, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF MAKING SPOOLS.

Application filed April 18, 1924. Serial No. 707,393.

This invention relates to spools, particu larly such as are used in wirebraiding machines and to a method of making the same, and is fullydescribed in the following specification and shown in the accompanyingdrawings in which:

Figure 1 is a longitudinal section through a spool showing the dies andtools for forming the same; v

Fig. 2 is a plan view partly 1n section showing the means for supportingthe tube during the pressing operation;

Fig. 3 is a longitudinal section through a completed spool; and

Fig. 4 is an end view of the same.

The embodiment of the invention illustrated comprises a spool as shownin Figs. 3 and 4 having a tube 10 having reduced ends 11 which extendthrough the end plates 12 and which are riveted or spun over at 13.

In assembling, the tube 10 is held between clamping members 14 and'15which are recessed to closely fit the tube, the members being securedupon the tube by means of a wedge 16. The members 14 and 15 are slightlyshorter than the distance between shoulders on the original tube asshown by Fig. 1 and act as stop means for limiting the distance theplates 12 are pressed in as will later be explained.

The end plates '12 have central openings adapted to fit over the ends 11of the tube and are countersunk at 12* on the outside to receive theriveted over ends 13 of the tube. With the end plates assembled on thereduced ends of the tube and the clamping members 14 and 15 in place asshown, the spool is placed between dies 17 and 18'which have centers 17and 18 which extend into the ends of the tube and curved annularportions 17 and 18 for .rounding the ends of the tube and forcing themback into the countersunk portions 16 as the dies are forced inwardly,thereby having these ends flush with the outer faces of the end plates.As the outer ends of the tube 10 are forced out wardly they cause anoutward dishing of the end plates 12 and as the dies 17 and 18 continueto move inwardly they encounter the dished plates 12 and force them backtoward the members 14 and 15, thereby causing them to resume their flatshape.

At the same time the tube'is shortened by the heavy pressure of the diesbut is prevented from buckling by the members 14 and tube 10 areoutwardly rounded and tlfi 65 assists in pressing thereinia coreli) ofwood or the like, whiclris slightly larger than the internal diameter ofthe tube 10, as shown in Fig.3, so that after being pressed in the coreis so firmly held that it will not loosen 7o even when subjected to oilfor long periods.

While I have shown and described but a single embodiment of myinvention, it is to be understood that it is capable of manymodifications; construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claim, in which it is my intention to claim all noveltyinherent in my invention as broadly as I claim: I The method of makingspools consisting of. placing perforated end plates over the repossiblein view of the prior art.

duced ends ofa metal tube, forcing a tapered die into each end of thetube with sufficient pressure to cause said tube to materially shorten,and holding said tube to prevent its bucklinga ARTHUR O. HOPKINS.

Changes therefore in the 75

